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Vaillant auroTHERM exclusive VTK 1140-2 Manual

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10 Technical data
64 Installation manual auroTHERM exclusive 0020077994_02
10 Technical data
10.1 Technical data table
Unit VTK 570/2 VTK 1140/2
Number of tubes − 6 12
η
0
(Aperture), DIN4757-4 or EN12975 % 64.2
c
1
with wind, or on aperture W/(m²k) 0.885
c
2
with wind, or on aperture W/(m²k²) 0.001
K
θ,trans
(50°), or on aperture − 1
K
θ,long
(50°), or on aperture − 0.9
Yield forecast (location: Würzburg, 5 m² aperture,
300 litre cylinder, 4 people)
kWh/m²a 586
Peak output per collector module W
peak
W 642 1278
Area-related heat capacity c kJ/(m²k) 8.3
Volume flow (per m² of collector surface) l/(m²h) 24
Minimum volume flow in the solar circuit l/h 180
Absolute pressure in the high vacuum bar 10
-5
mbar (= 10
-8
bar)
Alpha absorber absorption − > 93.5% (see also ITW test report)
Epsilon absorber emission − < 6% (see also ITW test report)
Grid dimensions (length x height x depth) m 0.7 x 1.65 x 0.11 1.39 x 1.65 x 0.11
Gross area m² 1.16 2.30
Aperture surface area m² 1.0 2.0
Absorber surface area m² 1.0 2.0
Collector capacity l 0.9 1.8
Weight kg 19 37
System overpressure, max. permissible bar 10
Shutdown temperature, max. °C 272
Connection width, flow/return mm 15
Material for the tube collector − Al/1.4301/glass/silicone/PBT/EPDM/TE
Material for glass tubes − Borosilicate 3.3
Material for selective absorber layer − Aluminium nitride
Glass tubes (outer diameter/inner diameter/wall
thickness/tube length)
− 47 / 37 / 1.6 / 1500
Colour (plastic parts) − Black
Thermal shock test ITW test
number
02COL282
Hail impact test in accordance with DIN EN 12975-2 TÜV test
number
435/142448
Type approval number − 01-228-770
Max. wind load kg/Nm
2
1.2
Max. standard snow load kg/Nm
2
5
On-roof installation angle ° 15-75
Flat roof installation angle ° 30, 45, 60
… 64 …


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